Optical Spin Vortex in Nonlinear Anisotropic Media

Details Optical Spin Vortex in Nonlinear Anisotropic Media Optical Spin Vortex in Nonlinear Anisotropic Media

1998-09-18

arxiv.org/abs/cond-mat/9809257v2

Physics

Condensed Matter

Materials Science

6 pages, 2 PostScript figures, RevTeX and epsfig.sty

Scientific paper

A theoretical study is given of a new type of optical vortex in nonlinear anisotropic media. This is called an ``optical spin vortex'', which is realized as a special solution of the two-component non-linear Schr\"{o}dinger equation. The existence of spin vortex is inherent in the spin texture that is caused by the anisotropy of dielectric tensor, where a role of spin is played by the Stokes vector. By introducing the effective Lagrangian governing the non-linear Schr\"{o}dinger equation, we derive the evolution equation for the motion of spin vortex, which exhibits a clear distinction from the conventional singular vortex inherent in the phase function that is described by the single component complex field.

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